根據世界衛生組織的報告，表示每日8小時接觸臭氧濃度平均值只要達到50 ppb就會提高1-2％死亡率，且長時間待在臭氧濃度超過60 ppb的環境時，就會破壞人體、動物和植物的黏膜組織和呼吸系統1。有鑑於此，各國科學家迫切開發相關材料，於一般環境下使臭氧達到分解效果。
本研究中，致力於合成manganese-silicate材料，應用於催化臭氧分解而形成氧氣。採用兩種合成方法製備金屬錳複合材料，分別為氧化矽剝蝕法及共沉降法。在氧化矽剝蝕法中，透過調整實驗反應條件，例如：Mn/Si莫耳比例、前驅物MnCO3之沉降溫度、反應水熱溫度及水熱時間合成manganese-silicate材料。在適當的反應條件下，前驅物MnCO3與矽酸鹽之間的作用力及拆解能力會較良好。接著，以數種儀器鑑定材料性質，同時期望能以儀器鑑定判別反應是否仍有前驅物殘留，藉由簡易的儀器鑑定作為剝蝕效果之指標。最後，分別於水熱70°C、85°C及100℃做manganese-silicate材料生成動力學的探討，如此，未來在實際運用上，能將氧化錳催化中心效用達最大化。
透過Infrared spectroscopy (IR)得知，若沒有足夠的水熱溫度及時間，會有前驅物MnCO3殘留而導致反應不完全，因此，另一合成方法為共沉降法，能改善前驅物之沉澱聚集現象，但是合成手法繁瑣，考慮到放大製程行之有礙，因此應用共沉降法簡化其步驟，合成出manganese-silicate材料有結構緊密且明顯有較完整片狀的孔洞材料。接著，加入矽藻土增加放大製程量產過程中其前驅物分散性，並作為助濾劑，藉由矽藻土的特性，低密度堆積及高吸收能力，可增加manganese-silicate材料在作為催化臭氧的材料通透性。因此，添加適量矽藻土調整Mn/Si莫耳比例、水熱及鍛燒，合成出manganese-silicate材料並造粒後，測試催化臭氧分解之效果。
由於台灣氣候潮濕，相對溼度動輒超過70-80%RH，manganese-silicate材料於低濕度環境下有較好的催化臭氧分解之效能，且經分解測試後，manganese-silicate材料易吸水的緣故，還須經高溫去除水份，得以重新做分解臭氧催化測試，因此，嘗試加入不同具有與臭氧反應的組成，應用較為簡易的共沉降法，結合manganese-silicate的複合材料，並分別造粒烘乾後直接充填於反應器內做催化臭氧分解效能之測試。

Ozone pollution represents a major challenge to improving the air quality of indoor environments. It originates mainly from outdoor atmospheric ozone and indoor emissions from household appliances such as laser printers, photocopiers, air purifiers, and so on. According to medical reports, ozone pollution may cause various health issues, including respiratory disease, cardiovascular disease, and even premature mortality. As a result, effective methods for reducing ozone pollution are urgently required. The feasibility of performing the catalytic decomposition of O3 to O2 under ambient conditions has attracted extensive interest in the literature owing to its rapid conversion rate. In the present study, two facile methods were employed for the preparation of mesoporous manganese–silicate for catalyzing the decomposition process, namely silicate-exfoliation and co-precipitation. In the first method, the completeness of the silicate-exfoliation reaction was judged by the presence of a vibration band at approximately 1440 cm-1 (CO32- ligand) in the infrared (IR) spectra of the manganese–silicate composites. Given a hydrothermal processing temperature of 85℃, the reaction process required approximately 55 hours to complete. However, given a higher temperature of 100℃, the reaction was completed in just 24 hours. In the co-precipitation method, the reaction process was simplified by adding the sodium silicate to the reaction solution first and then adjusting the pH to 9; thereby preventing the accumulation of manganese ions through a self-precipitation effect. The decomposition test results showed that, by using a Mn/Si molar ratio of 0.25, a hydrothermal processing temperature of 100℃and a processing time of 24 hours, the mesoporous manganese–silicate powder could be granulated into millimeter-sized particles without the need for calcination. The experimental results showed that the granulated manganese–silicate powder was capable of decomposing ozone 0.177 g-O3/g-manganese–silicate in 742 minutes.

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